Heating device



' March 25, 1930. A. R. GOULD 1,751,581

HEATING DEVICE Filed May 17, 1928 2 Sheets-Sheet 1 IN VEN TOR.

/1. Fay/770270 60 u/ BY A TTORNEY A. R. GOULD HEATING DEVICE March 25, 1930.

Filed May 17, 1928 2 Sheets-Sheet 2 YJNVENTOR. fl. flay/27000 50m. ,BY

ATTORNEY Patented Mar. 25, 1930 '1 UNITED STATES PATENTOFFICE ART-HUB RAYMOND eotmn'or KANSAS CITY, KANSAS HEATING DEvIcn Application filed Mayrl'i, 1928 Serial No. 278,378.

My invention relates to heating devices and more particularly to heating devices employing gas or like fuel and has for its principal object to vprovide more efiicient and economic '5 consumption of fuel and forthe increased radiation of the heat generated thereby. V

In accomplishing these and other objects of the invention I have provided improved details of structure, the preferred formsof To which are illustrated in the accompanying drawings, wherein:

Fig. '1 is. a vertical sectional perspective ing to my invention and including a fire pot' 2, a heat retaining dome or chamber 3, and a radiator unit 4. 3o

ing 5 having a horizontally disposed bottom 6 spaced from the floor to provide an air passage 7 thereunderfor a purpose hereinafter described. v y Y Aburner 8 of novel construction ispreferably cast integrally with the fire pot and includesan inverted U shapedtubular air discharge conduit 9, the vertical legs 10 of c which extend upwardlyfrom the bottom of the pot and communicate at their lower ends through inlet openings 11 with the air passageway 6 beneath the fire pot. The horizontal leg 12 of the conduit 9is provided midway thereof with an air outlet port 13 formed by a vertical collar 14 integral with the burner. The outlet port 13 is preferably of the same diameter as each of the inlets 10, thus providing a restricted outlet for the air and being adapted to retain the air within the conduit until it has become preheated and expanded to The fire pot 2. comprises a cylindrical cast provide sufficient pressure to deliver the air with substantial velocity through the outlet port 13 intothe fire pot adjacent a fuel discharge pipe 15; I

The pipe 15 is connected with a source of fuel supply not shownand preferably extends upwardly through the bottom of the pot and is coiled about the air conduit as at 16 and then extends upwardly concentrically through the air conduit to a point adjacent the top of the collar 14, the coil being provided for preheating and expanding the fuel and for building up pressure therein so that the gas may be ejected at a velocity proport'iona te to that ofthe air, whereby the gas and air may readily unite to form a combustible mixture. I v

The discharge port portion 17 of the pipe' 15 is equipped with a threaded plug 18 having an orifice19 of a size to furnish the proper discharge of fuel therefrom and which is preferably located at a substantial distance below the top of the pipe for more efficient operation, for example, so that when the burner is on low heat the walls of the pipe willprote'ct the feeble flame from being blown out by air passing through the air outlet 13.

The heat retaining dome 3 is mounted on the top rim of the fire pot which is preferably orovided with an offset peripheral flange 20 to provide a circumferential seat 21 for receiving the dome 3. Thedome ,3 comprisesa cylindrical casting substantially the diameter of the fire pot and is provided at its lower end with an inwardly extending flange 22 for receiving a grate member 23 and at its upper end with an integral in-- verted "cone-shaped cover 24 for closing the top and returning gases downwardlytowards the grate memben. g I v v The grate member comprises a circular disk 25 having parallel slots 26 through, which products of combustion escape from the fire pot, the provision ofslots producing bars 27 for supporting a refractorymaterial 28 hereinafter described. V

Formed integrally with the grate member and concentrically of its lower face is a -de pending convex flame spreader 29, located directly above the fuel discharge pipe so as to directly receive the flame and spread it over the entire surface of the grate and throughout the refractory material supported thereby. The refractory material not only absorbs and retains heat of the flame but when incandescent also tends to ignite unburned gases that pass through the grate.

The radiator unit f is preferably cast 1ntegrally with the heat retaining dome'and comprises spaced outer and inner walls 30 and 81 closed at the ends to provide a hot passageway 32 therebetweon. The radi ator is of larger d ameter than the dome to provide a circumf ntia-l air duct 33 about the dome, and extends from adjacent the lower end thereof upwardly to provide sufficient radiation surface to dispense most of the heat from the products of combustion, the radiator being connected adjacent its lower ends with the heat-retaining chamber of the dome by tubular-passage members 34 and lugs or arms 35 extending from the sides of the dome 3.

In order to provide for tortuous passage of gases through the radiator, it is provided with a plurality of spaced horizontally dis posed partitions 36, each partition having openings 3'? staggered with relation to the openings .in the adjacent plates, making it necessary for the gases to travel in circular paths back and forth between the partitions to the gas outlet 38 which is connected to a stack or'flue not shown. V

The furnace thus described may be furnished with the usual casing 39 having a cold air inlet 40 adjacent the bottom and hot air outlet pipes 41 at its upper end for discharging heated air to various registers in the building as in ordinary practice.

To operate the furnace constructed as described the fuel control valve is opened and the fuel flows through the preheating coil and out through the discharge pipe where it is ignited, the gas uniting with air which is drawn from underneath the fire pot and discharged through the collar. As the burner heats up, the pressure is automatically increased due to the expanding of the gas and air, and the air is drawn through the outlet about the fuel discharge much in the manher of an ordinary Bunsen burner. The air unites with the discharged fuel to furnish an intense blue flame since relatively complete combustion is provided because of an excess supply of oxygen drawn into the furnace due to the peculiar construction of the air inlet.

I The flame strikes the spreader and is defiected thereby over the area of the grate and through the bed of refractory material supported thereby. The products of combustion then pass through the'passageways 84;

into the radiator unit and through the flue opening outwardly toward the stack.

What I claim and desire to secure by Letters Patent is:

1. In a device of the character described, a fire pot, a fuel conductor provided with an outlet, a flame spreader above the outlet, and an air discharge conduit having spaced air inlets and a common air outlet concentric with the fuel outlet, the air outlet being of smaller cross sectional area than the combined areas of the air inlets.

2. A device of the character described comprising a fire pot including an inverted U-shaped air discharge conduit having spaced air inlets and a central air discharge outlet opening upwardly thereof and a fuel discharge pipe concentric with the air outlet.

and a fuel preheater connected with the fuel discharge pipe.

4. In a device of the character described, a fire pot having a spaced bottom, a grate enclosing the upper end of the fire pot, a flame spreader carried by the grate, an air discharge conduit supported on the bottom of the fire pot and having spaced air inlets and an upwardly directed air outlet of smaller cross section than the combined areas of the inlets, and a fuel inlet pipe having a discharge outlet concentric with said air outlet and clirected toward the flame spreader.

5.1n a device of the character described,

a fire pot having a raised bottom, a grate enclosing the upper end of the fire pot, a convex shaped flame spreader carried by the grate, an air discharge conduit supported on the bottom of the fire pot and having spaced air inlet ports and an upwardly directed air outlet of smaller cross section than the combined areas of the inlet ports, and a fuel inlet pipe having a discharge outlet adjacent said air outlet and directed toward the flame spreader.

6. In a furnace, a fire pot, a dome comprising a cylindrical wall and a cover, mounted on the fire pot, and a radiator unit in communication with the dome and spaced there from to form a duct.

7 In a furnace, a fire pot, a dome mounted on the fire pot to receive products of combustion therefrom, a radiator comprising spaced cylindrical walls, and means including a tubular member supporting the radiator in spaced relation with the dome and providing communication between the radiator and dome. 

